一种隧道内超高压涌水封堵装置及方法
By using an ultra-high pressure water inrush sealing device inside the tunnel, and utilizing an annular airbag and gate mechanism to achieve dynamic sealing between the drill rod and the gate valve, the problems of grout wall instability and uncontrolled high pressure water inrush at the borehole during traditional grouting were solved, ensuring the safety and efficiency of tunnel construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN JIAOTOU CONSTR ENG CO LTD
- Filing Date
- 2025-12-26
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional advanced grouting can lead to grout wall instability and uncontrolled high-pressure water inrush at the borehole opening, which are two major safety risks in tunnel construction. In particular, under high-pressure water inrush, it is difficult to effectively seal the hole during the drill rod withdrawal process, which poses a safety hazard.
An ultra-high pressure water inrush sealing device for tunnels is adopted, including a drill support main structure, a ring sealing mechanism and a gate mechanism. The gap between the drill rod and the gate valve is sealed by an annular airbag, and the gate valve is automatically closed by the gate mechanism after the drill rod is withdrawn. Combined with the 'advanced pipe roof-grout stop wall' integrated support structure, it provides axial support to resist rock pressure.
It enables immediate and proactive sealing of borehole water inflow, eliminates safety hazards such as high-pressure jetting and grout stop wall instability, improves the reliability of sealing and construction safety, reduces reliance on personnel experience, and enhances construction efficiency.
Smart Images
Figure CN121576101B_ABST